Coking VOC (volatile organic compound) gas incineration treatment and utilization system

Abstract

The utility model discloses a coking VOC (volatile organic compound) gas incineration treatment and utilization system which comprises a combustion chamber and a burnout chamber, annular preheating cavities are arranged on the outer walls of the burnout chamber and the middle of the combustion chamber, the interior of each preheating cavity is sequentially divided into a gas inlet chamber, a preheating chamber and a gas outlet chamber from top to bottom through two annular plates, and a plurality of heat exchange tubes are arranged in each preheating chamber. A gas inlet and an oxygen inlet are formed in the outer wall of the preheating chamber in the tangential direction, a VOC waste gas inlet is formed in the outer wall of the preheating chamber arranged on the combustion chamber, a plurality of gas ejector pipes are evenly distributed on the side walls of the combustion chamber and the burnout chamber in the preheating chamber in the circumferential direction, and burners are arranged on the lower portion of the combustion chamber and the lower portion of the burnout chamber. The top of the burnout chamber is communicated with a gas inlet chamber arranged on the outer wall of the burnout chamber through a pipeline, a gas outlet chamber on the burnout chamber is communicated with a gas inlet chamber on the combustion chamber, and the gas outlet chamber on the combustion chamber is connected with a heat exchanger and a gas purifier. In conclusion, the garbage incinerator has the advantages of being thorough in incineration, capable of recycling waste heat and small in environmental pollution.

Description

TECHNICAL FIELD

[0001] The utility model relates to coking waste gas treatment technical field, concretely relates to a kind of coking VOC gas incineration treatment utilization system. BACKGROUND

[0002] VOC waste gas refers to the organic compound in gaseous molecular form existing in atmosphere under normal air pressure, with boiling point greater than or equal to 260 DEG C. Coking plant produces coke mainly through raw material coal high-temperature decomposition, in the process of producing coke, coke oven gas has part of flue gas to enter the sequence of coal chemical production along with pipeline, a large amount of VOC waste gas is generated when separating tar, crude benzene and sulfur from raw coke oven gas, these VOC waste gas contains dust particles, sulfur dioxide, nitrogen oxides and fluorides, which can affect the surrounding environment and human health. Incineration of VOC gas is a common and effective treatment method, which can reduce VOC emission and reduce the impact on the environment. VOC incineration completely decomposes VOC gas into carbon dioxide and water through high-temperature combustion, thereby converting harmful VOC compounds into relatively harmless substances.

[0003] At present, VOC gas is transmitted to incinerator when incinerated, and the gas is incinerated by incinerator, but there are still the following problems: first, after incineration, the waste gas generated by incineration is directly discharged to realize the incineration treatment of VOC gas, but the heat in the waste gas is also discharged, which not only causes resource waste, but also the waste gas is not purified, and if it is directly discharged, it will pollute the external air environment; second, oxygen and VOC gas are not fully mixed in incinerator, and there is the problem of incomplete combustion, and the emission of nitrogen oxides is over-standard. Therefore, it is an objective need to develop a coking VOC gas incineration treatment utilization system which is completely incinerated, can recover waste heat and has little environmental pollution. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of coking VOC gas incineration treatment utilization system which is completely incinerated, can recover waste heat and has little environmental pollution.

[0005] The utility model discloses a combustion chamber and burn -out chamber, the bottom of burn -out chamber and the top of combustion chamber intercommunication, and the outer wall of burn -out chamber and combustion chamber middle part all is provided with annular preheating chamber, the inside of preheating chamber is separated into air inlet chamber, preheating chamber and air outlet chamber from top to bottom in proper order through two ring plates, is provided with a plurality of heat exchange pipes that preheating chamber is communicated air inlet chamber and air outlet chamber in preheating chamber, and the outer wall of preheating chamber is provided with gas inlet and oxygen inlet tangentially, wherein the outer wall of preheating chamber that is provided on combustion chamber is provided with VOC waste gas inlet, and the sidewall of combustion chamber and burn -out chamber in preheating chamber all is circumferentially distributed with a plurality of jet pipes, and the lower part of combustion chamber and burn -out chamber is provided with combustor, and the top of burn -out chamber is communicated with the air inlet chamber that is provided on its outer wall through pipeline, and the air outlet chamber on burn -out chamber is communicated with the air inlet chamber on combustion chamber, and the air outlet chamber on combustion chamber is connected with heat exchanger and gas purifier in proper order through pipeline.

[0006] Further, the preheating chamber is provided with a spiral ring plate, which divides the interior of the preheating chamber into a spiral channel, and the heat exchange pipes are evenly distributed in the spiral channel.

[0007] Further, the outer wall of the heat exchange pipe is provided with annular cooling fins.

[0008] Further, the air inlet chamber is provided with an annular air distributor.

[0009] Further, the jet pipe is provided with a central shaft, and the central shaft is provided with a spiral guide plate.

[0010] Further, the bottom of the combustion chamber and the burn-out chamber is a conical structure, and the outer wall of the cone is provided with a vibrator.

[0011] The utility model discloses a kind of VOC waste gas incinerators, including combustion chamber, burner, heat exchanger, gas purifier, preheating chamber, exhaust chamber, air inlet chamber, gas inlet chamber, heat exchange pipe, gas, oxygen and VOC waste gas are tangentially introduced into preheating chamber outside combustion chamber, three kinds of gas form cyclone in preheating chamber, on one hand constantly mixed evenly in flow process, on the other hand constantly absorb the heat emitted by heat exchange pipe, reach the purpose of gas preheating, mixed gas after preheating is introduced into combustion chamber, open burner and ignite mixed gas in combustion chamber, VOC waste gas is directly and rapidly and efficiently decomposed under flameless combustion environment, reduce the generation of nitrogen-containing small molecule in decomposition process, continue to rise subsequently, it is found in actual use process that still contain a certain amount of VOC gas in waste gas after combustion, at this time, gas and oxygen are introduced into preheating chamber outside burnout chamber, similarly, gas and oxygen are mixed and preheated in the preheating chamber, burn after entering exhaust chamber, further decompose VOC gas in waste gas completely, remaining waste gas is discharged from the top of exhaust chamber, first enter air inlet chamber on exhaust chamber, then enter air inlet chamber on combustion chamber, heat mixed gas in corresponding preheating chamber, then be introduced into heat exchanger, using low-temperature medium such as cold water, cold oil or cold gas to absorb heat in waste gas, produce corresponding heat medium, for domestic or industrial use, finally, waste gas after cooling is introduced into gas purifier and discharged after dust cleaning treatment. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is overall structure schematic diagram of the utility model;

[0013] Figure 2 It is Figure 1 It is sectional structure schematic diagram of A-A in the middle;

[0014] In the figure: 1-combustion chamber, 2-combustion chamber, 3-inlet chamber, 4-preheating chamber, 5-outlet chamber, 6-heat exchange tube, 7-gas inlet, 8-oxygen inlet, 9-VOC exhaust gas inlet, 10-jet pipe, 11-burner, 12-vibrator, 13-heat exchanger, 14-gas purifier, 15-spiral ring plate, 16-spiral channel, 17-annular fin, 18-air distributor, 19-spiral guide plate, 20-cone. DETAILED DESCRIPTION

[0015] The utility model makes further explanation in combination with the drawings, but not in any way to the utility model add restrictions, based on the utility model made, any change or improvement, all belong to the protection scope of the utility model.

[0016] As Figures 1-2 The utility model discloses a mixed gas combustion device, which comprises a combustion chamber 1 and a combustion chamber 2, the combustion chamber 1 and the combustion chamber 2 are all mixed gas combustion chambers, the bottom of the combustion chamber 2 is communicated with the top of the combustion chamber 1, the outer wall of the combustion chamber 2 and the combustion chamber 1 middle part is all provided with annular preheating cavity, the inside of the preheating cavity is sequentially separated into an inlet chamber 3, a preheating chamber 4 and an outlet chamber 5 from top to bottom through two ring plates, a plurality of heat exchange tubes 6 communicated with the inlet chamber 3 and the outlet chamber 5 are arranged in the preheating chamber 4, the gas inlet 7 and the oxygen inlet 8 are arranged on the outer wall of the preheating chamber 4 in a tangential direction, wherein the VOC exhaust gas inlet 9 is arranged on the outer wall of the preheating chamber 4 arranged on the combustion chamber 1, a plurality of jet pipes 10 are arranged on the side wall of the combustion chamber 1 and the combustion chamber 2 in the preheating chamber 4 in a circumferential direction, the combustion chamber 1 and the combustion chamber 2 are all provided with a burner 11 at the lower part, the burner 11 is prior art, which is used for igniting mixed gas, the top of the combustion chamber 2 is communicated with the inlet chamber 3 arranged on the outer wall thereof through a pipeline, the outlet chamber 5 on the combustion chamber 2 is communicated with the inlet chamber 3 on the combustion chamber 1, the outlet chamber 5 on the combustion chamber 1 is sequentially connected with a heat exchanger 13 and a gas purifier 14 through a pipeline, the heat exchanger 13 and the gas purifier 14 are all prior art, the heat exchanger 13 is used for absorbing the waste heat in the exhaust gas and obtaining corresponding heat medium, which is used for domestic heating or industrial heating, and the gas purifier 14 is used for dust removal, desulfurization and denitrification and other evolution treatment of the exhaust gas.

[0017] The utility model discloses a gas, oxygen and VOC waste gas are cut into the preheating chamber 4 outside the combustion chamber 1 when operating, and the three kinds of gas form the cyclone in the preheating chamber 4, on the one hand, constantly mix evenly in the flow process, on the other hand, constantly absorb the heat that heat exchange pipe 6 emits, reach the purpose of gas preheating, and the mixed gas after preheating is passed into the combustion chamber 1, and the mixed gas in the combustion chamber 1 is ignited by opening the burner 11, and VOC waste gas is directly and rapidly and efficiently decomposed under the environment of flameless combustion, reduces the production of nitrogen-containing small molecules in the decomposition process, and then continues to rise, and it is found in the actual use process that a certain amount of VOC gas is still contained in the waste gas after combustion, at this time, the gas and oxygen are passed into the preheating chamber 4 outside the burnout chamber 2, and the gas and oxygen are mixed and preheated in the preheating chamber 4, and the VOC gas in the waste gas is decomposed completely after entering the burnout chamber 2 and burning, and the remaining waste gas is discharged from the top of the burnout chamber 2, enters the gas inlet chamber 3 on the burnout chamber 2 first, and then enters the gas inlet chamber 3 on the combustion chamber 1, heats the mixed gas in the corresponding preheating chamber 4, and then is passed into the heat exchanger 13, utilizes low-temperature medium such as cold water, cold oil or cold gas to absorb the heat in the waste gas, generates corresponding heat medium, and is used for living or industrial use, and finally, the waste gas after cooling is discharged after dust removal and purification treatment in the gas purifier 14.

[0018] In the above use process, on the one hand, the gas, oxygen and VOC gas rotate and flow in the preheating chamber 4, can be fully mixed, and can be fully combusted in the combustion chamber 1 and the burnout chamber 2, on the other hand, the utility model discloses the burnout chamber 2 and the combustion chamber 1 of upper and lower structure, and the VOC gas is fully combusted in the combustion chamber 1 first, and then is combusted in the burnout chamber 2, and can be more completely decomposed VOC gas through twice combustion decomposition, secondly, the waste gas formed after VOC gas combustion is discharged from the top of the burnout chamber 2, and is passed into the preheating cavity on the outer wall of the burnout chamber 2 and the combustion chamber 1 in turn, and the gas, oxygen and VOC gas are preheated, on the one hand, absorb the waste heat in the waste gas, avoid the waste of heat, on the other hand, improve the temperature of the gas, oxygen and VOC gas, improve the combustion efficiency of the mixed gas, the temperature rising speed is faster when burning, can rapidly decompose VOC gas, and avoid the production of dioxin in the incineration process, reduce the pollution of the environment, and the heat exchanger 13 is further arranged, and the waste heat in the waste gas is further recovered and utilized, finally, the gas after cooling is purified by the gas purifier 14, and the pollution of the environment by the waste gas is reduced.

[0019] A spiral ring plate 15 is arranged in the preheating chamber 4, the spiral ring plate 15 divides the inside of the preheating chamber 4 into a spiral channel 16 in communication, and the heat exchange pipes 13 are uniformly distributed in the spiral channel 16. When the oxygen, the fuel gas and the VOC gas enter the preheating chamber 4, the mixed gas can flow along the spiral channel 16 under the action of the spiral ring plate 15, so that the various gases are uniformly mixed, and meanwhile, the heat exchange pipes 13 are uniformly distributed in the spiral channel 16, which is beneficial to improving the heat exchange efficiency of the mixed gas and the heat exchange pipes 13.

[0020] The outer wall of the heat exchange pipe 13 is provided with an annular heat dissipation fin 17, the annular heat dissipation fin 17 has high heat conduction and heat dissipation performance, the annular heat dissipation fin 17 is arranged on the heat exchange pipe 13, so that the heat exchange area of the heat exchange pipe 13 and the mixed waste gas is increased, and then the heat exchange efficiency of the high-temperature waste gas in the heat exchange pipe 13 and the mixed gas is improved.

[0021] The gas distributor 18 is arranged in the gas inlet chamber 3, the gas distributor 18 is a prior structure, in the utility model, the high-temperature waste gas generated after the mixed gas is burned enters the preheating chamber 4 from the top of the preheating cavity, is uniformly distributed on the cross section of the preheating chamber 4 after passing through the gas distributor 18, and then uniformly enters each heat exchange pipe 6, so that the heat exchange efficiency of the waste gas in the heat exchange pipe 6 and the mixed gas in the preheating chamber 4 is improved.

[0022] The middle shaft is arranged in the gas injection pipe 10, the spiral guide plate 19 is arranged on the middle shaft, the oxygen, the fuel gas and the VOC gas enter the preheating chamber 4, are mixed and preheated in the preheating chamber 4, and then are injected into the combustion chamber 1 and the burnout chamber 2 from the gas injection pipe 10 to burn, when the mixed gas enters the gas injection pipe 10, the spiral flow is formed, the mixing degree of various gases is improved, the various gases are uniformly mixed, meanwhile, the mixed gas can also keep a certain spiral flow state after being injected, so that the VOC gas is burned more fully.

[0023] The bottoms of the combustion chamber 1 and the burnout chamber 2 are all in the structure of the cone 20, the vibrator 12 is arranged on the outer wall of the cone 20, since the coking VOC gas contains certain impurities, when the mixed gas burns in the combustion chamber 1 and the burnout chamber 2, certain ash and sediment are generated, in order to facilitate the ash and the sediment to be discharged, the bottoms of the combustion chamber 1 and the burnout chamber 2 are arranged in the structure of the cone 20, the ash can slide along the slope of the cone 20, so that the ash is prevented from being accumulated at the bottoms of the combustion chamber 1 and the burnout chamber 2, meanwhile, in order to prevent the ash from adhering to the cone 20, the vibrator 12 is arranged on the cone 20, so that the ash is scattered and falls.

Claims

1. A coking VOC gas incineration treatment utilization system comprising a combustion chamber (1) and a burnout chamber (2), characterized by The bottom of the burnout chamber (2) is communicated with the top of the combustion chamber (1), and the outer wall of the middle part of the burnout chamber (2) and the combustion chamber (1) is provided with an annular preheating cavity, the inside of the preheating cavity is sequentially separated into an air inlet chamber (3), a preheating chamber (4) and an air outlet chamber (5) from top to bottom by two annular plates, a plurality of heat exchange pipes (6) communicating the air inlet chamber (3) and the air outlet chamber (5) are arranged in the preheating chamber (4), the outer wall of the preheating chamber (4) is tangentially provided with a gas inlet (7) and an oxygen inlet (8), the outer wall of the preheating chamber (4) arranged on the combustion chamber (1) is provided with a VOC waste gas inlet (9), a plurality of air injection pipes (10) are circumferentially arranged on the side wall of the combustion chamber (1) and the burnout chamber (2) in the preheating chamber (4), the lower part of the combustion chamber (1) and the burnout chamber (2) is provided with a burner (11), the top of the burnout chamber (2) is communicated with the air inlet chamber (3) arranged on the outer wall thereof through a pipeline, the air outlet chamber (5) on the burnout chamber (2) is communicated with the air inlet chamber (3) on the combustion chamber (1), and the air outlet chamber (5) on the combustion chamber (1) is sequentially connected with a heat exchanger (13) and a gas purifier (14) through a pipeline.

2. The coking VOC gas incineration treatment utilization system according to claim 1, characterized by: A spiral annular plate (15) is arranged in the preheating chamber (4), the spiral annular plate (15) separates the inside of the preheating chamber (4) into a spiral channel (16) in communication, and the heat exchange pipes (6) are uniformly distributed in the spiral channel (16).

3. The coking VOC gas incineration treatment utilization system according to claim 1, characterized by: The outer wall of the heat exchange pipe (6) is provided with an annular cooling fin (17).

4. The coked VOC gas incineration treatment utilization system according to claim 1, characterized by: The air inlet chamber (3) is provided with an annular air distributor (18).

5. The coked VOC gas incineration treatment utilization system according to claim 1, characterized by: The air injection pipe (10) is provided with a central shaft, and the central shaft is provided with a spiral guide plate (19).

6. The coking VOC gas incineration treatment utilization system according to claim 1, characterized by: The bottom of the combustion chamber (1) and the burnout chamber (2) is a conical body (20) structure, and the outer wall of the conical body (20) is provided with a vibrator (12).

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